Clamping device for files, newspaper holders, and the like



June 1930. F. POHLET AL. 1,765,880

CLAMPING- DEVICE FOR FILES, NEWSPAPER HOLDERS, AND THE LIKE Filed Jan. 31, 1929 2 Sheets-SheeL 1 June 24, 1930. F. POHL ET AL 1,765,880

CLAMPING' DEVICE FOR FILES, NEWSPAPER HOLDERS, AND THE LIKE Filed Jan. 51, 1929 2 Sheets-Sheet, 2

' Patented June 24,1930

, FRITZ PFOIHL, r "vIi mNA, isa" M ater.:tvimmiiflrn a311;;; or FBANKFBION?TH E-1Y[AVIN, GERMANY.

e ctmmqafmvm front, aims, 'mwsmmanqtnm, Ann THEYLIKE f This invention relates to a clamping device accuratelyadjustable and'more' reliab'le than .for holding 'nonperforated papers in' files or newspaper holdersuand' the likes The re,-

silient clamping element, adapted to be lifted or lowered and acting upon the paper, is held infthe-clamping position byim'eans of a slide, guided in the direction of the hinge-bolt of bolt 8.; On this bolt 8 the downwardly bent flaps'9'of the clamping element2 are rotatably niountedbetween the bearing flaps 7 i 3 t The clamping element 2 has onits lower a the, two clamping elements and having tightening surfaces. Owing to'this construction a clampingefiect'is obtaifiedwhichi's more in the commonly used devices. An embodiment .of the invention .is illustrated byway of example in the accompanying drawingin which:

- Fig. 1 shows a formof construction ofthe clamping devicein cross-section:'and in the inoperative position. I

c Fig. 2 is asimilar'vie-wasFig. 1, theclainp ing element being-lowered but not yet operative. I.

.Fig. 3 isa top plan'view' ofiFig. 2.

. Fig. 4c-is'asimilar cross section as'Fig. 2,

the clamping element or tightening faces be- ;inglinthe operative position;

5 is p plan viewofFig. 4.

; -,-.Fig-. 6 shows the clamping device iafront elevation, the tightening faces beingstill in the inoperative position.

I Fig. 7' shows a' clamping device of modified construction in cross section in the open 'pos1t1on.-

- Fig.8 is asiinilar as Fig. 7, the clamping' element, beingv tightened. I

Fig. 9 shows another modification of the clamping device, the clamping element being shown incrossse'ction in the operative posi- -Fig.'11 shows in crossv'sectiofn the-clamping device, the olampingqelement of which'is in the inoperative position, and a; braking, de'-' vicewhich is provided: i

Fig. 12 isaside eleVati nfQfF gf i.

The clamping device cons'ists of. a' base plate 1, to be'fixed onthe 'file or (in-a newspaper holder, of a movable clamping element2 adaptedtobe oscillated 90 and of a looking slide 3 having tightening faces." The narrow base plate 1 has its right longitudinal movable flaps 9.

. The clampmg p p I ANn-M xvoq anfon F ANK?o nr-omrnnmrern, i J ennmnxnssmnons TO THE FIRM: voq n-n. G., ensczmnmssficnnnum) edge 4 ni hnybma maid to bett r-hold the clamped papers. The base plate 1 has on the left longitudinal edge on each end of thesameantpwardly bent flap 5 and at the middle an extensionfi; (Figsp8, 5- and 6 the semicircular transverse edges of which are bent" upward to form bearing flaps 7, for a side 'a slightly curved spring blade 10, ex-

tending in the longitudinal direction 'of the base plate 1, the'ends of said spring blade pressing" against the papers when theclamping'element2 is lowered. J 1 i The locking slid 3 consists ofhalf-a: sleeve,

the longitudinal-edges of which form two pairs of wedge faces;12,'12 and-13, v13 (Fig;

the locking slide 3 is pressed in, the wedge faces 12, '13 arranged the one behind theothei r bear againstithe ends of the slots'in theasta tionary flaps 7 and'the other wedge faces 12,

13 bear against the ends-of the slots in th'e ,The lowered clamping element2. blade sp'ringlO is at the pushingin of the v The base plate '1 is fixed on th'e. I of thefile for example by small rivets:'or.-the like, and it has with this object. inview: two

rivet holes 11 (Fig. 1 7.0

locking slide 3 pressed continually more strongly-against the base plate 1, so. that the clamped papers are securely. held, Owing to the feeble pitch of the wedge faces, (which for .clearne'ss sake are'shown inthe drawing a larger than the naturalscale) automatic loosening of the clamping element2 is abso- 'lutely prevented;

' device'shownin Figs'j Tand 8'is distinguished by a specially simple construction and low height. Inthis'form' of 'constructionc'urved slots 1% are provided only in the stationary flaps-Tot "the base When the locking slide 3- is being pushed 55 i e l; A clampingQdevice,specially designed in, the wedge faces 12 are supported by the ends of the curved slots 14, the wedge faces 12 acting upon the abutment faces 15 of the flaps9 Wherebythe blade spring of the clampinglelenient 2 is strongly, and securely presse'd against thebase platen 1 In order that :thelocking slide 3 more effectively locked in any actual p osition a braking device is provided iflthefrm' ofcon s'truction shownin- Figs. 912012; This braking device consists'preferablyof aspiral spring 16, thelend 17 ofwhich is fixed on the base plate 1, the other'end 18 pressingagainst the inneredge of the clamping element2 so that this clamping element is automatically lifted byfthe spring 16,when the locking slide 3: is being pulled out; i

V s s 'Ili theclampingdevice showninF-igs. 9 j a and 10,the portion 8; oftheaxlez8flsituated between the bearing fiaps-9 of the clamping element 2 isof such diameter that the spiral spring 16 w0und1 aroundthis portion bears against the inner surface .ofthe locking slide 3;;The. spiral sprin'g 16f exerts therefore a r Y and; more efiectively securedo against 'acci-' dental ishifting 53 spiral spring 16 thefollowingarrangement brakingactionopposing a longitudinal shift- I ing. of the locking slide so that this loclzing slide :is. better secured in its actual, position iInordertoavoid the great diameter of the is-inade according toiFigs'. 11 and12, L :Theiaxlie- 8: is of-small-ldiameter and not fixed by rivets in the outer 'bearingfla ps -7"of the base plate 1 but shiftably mounted in .a ll ,four bearing flaps-7,9, itsltwo ends" being journaledin cup-shaped handles 19Eof the locking slide 48; so i that, when; this locking slide is being shifted, the axle- .87 is; shifted "also.. The spiral springR16 tightly wound around the b'olt 8 exerts" therefore at longitudinalshiftingxof thelocking slide a brak I ing-action upon thisslide so that theclamping element 2is sufficiently seeured'in any 'axle8"against-bending. V

- ositionagainst" accidental lifting. This rakingxefi'ect of thespiralspring 16 is still I j for fil'es, newspaper" holders and the like, 1 comprising in combination a yieldable damping element adapted to "be lowered" upon "the papers'and tobe raised from the same, an axle of1 said clamping element, a

base plate in the file supportingftheaxle of said clamping element and a locking j slide having wedgefaces shiftable. along said axle to secure said clamping element in the lo'ck ing position.

2. A clamping device speciallydesigned for files, newspaper holders and the like, comprising in combinationa basewplate fixed in the file, a lateralextensioniat one long; sideofsaid base plate, flaps formed by the upwardly turned ends of said extension have ing each a curvedfl-slot; an axle; journaled in said 'fiaps, a clamping element en" said'axle,

two downwardly directed flanges at the? ends v of said clamping element having each a V r curved s'lotfa locking slide'in' theshape of a' 7 half sleeve I guided in said curved slots in said four-flaps and having edges composed each of two' offset wedge faces designed to a hear those of the one set againstrthe ends 01 thev curved slotsiin the" flaps of the base plate and those of theother set'against the ends of the curved-slots in the flaps ot'saidz clamping element;

3.: A clamping deviceas specified in claim 1, comprising lIliCOIIlbil'liLtlOIl with the locking slide, a braking'device adaptedto lock said slldeagainstaccidental shifting;

4;. Aclamping. device as" specified in 'claim 1, comprising in combination with the axle, the clamping element and with th-e locking slide, a spiral spring-i wound "around said adapted to brakesaidslid'e by friction and bearing against said clamping element to automatically lift' thefsam e hen'dt' is released by said lockingvslifde.

". A clamping. device: specially designed for files, newspaper hol ders and "the like. comprising in combinationa base platefixed; in the file, allateral extensionyatoneilong sideof said base plate, flapsformed by the ,upwardly turned ends of'saidlextension hav 111g 7 each a curved 2 slot; an axle extending throughfisaidhflztpsi, fa 'clampingelementon said axle, two: downwardly directed flanges at the ends of said clan iping element having each a curve'd'slot a locking slide in the s ape of a half sleeve guided in said curved slots in said fourflaps and havinged-gesconr. posed each of two ofi'set Wedge faces-designed tobear those of theone'set against the ends of the curved slots in the flaps of the' base plate and those? of the other setagainst the ends of 'the'curved slots in the flaps of said clamping. element, a cup-shaped handle at' each end of said, locking slide in which: said 7' axle of said clampi-Iig'elementis fixed,;and V 7 a, spiral r=spring tightly:Wound on said axle adapted to securesaid'lockingslide against accidental shifting owingto the friction bea tween said spring and said axle and between said axle and theholesin'the flaps through which saiduaxle' extends. V In testimony'whereof we 'affix our-signatures. .s a a Y MAX V OGELH a FRITZ POHL. g H 

